Auxiliary rifle-barrel for guns



(No Model.)

H. T. MARTIN.

AUXILIARY RIFLE BARREL FOR GUNS. No 271,883. Patented Feb. 6,1883.

WITNBSSBSZ: IN VENTOR ATTORNEYS.

UNiEn STATES ATENT OFFICE.

HARRY T. MARTIN, OF FORT ROBINSON, NEBRASKA.

AUXILIARY RIFLE-BARREL FOR GUNS.

SPECIFICATION forming part of Letters Patent No. 271,883, dated February6, 1883,

Application filed A ugust 10, 1882. (No model.)

T 0 all whom it may concern:

Be it known that I, HARRY T. MARTIN, of Fort Robinson, in the county ofSioux and State of Nebraska, have invented a new and ImprovedCartridge-Rifle, of which the following is a full, clear, and exactdescription.

The object of my invention is to provide an attachment to the UnitedStates or Springfield rifle, and also to other rifles of large caliber,whereby the small thirty-two-one-hundredths cartridges may be used inthem for gallery practice and elsewhere, by which the labor and expense,also the expensive tools, now required for making theforty-flve-onehundredths cartridges may be dispensed with.

The invention relates to a device which I call a cartridge-rifle, thesame being a bushing for the breech of the rifle-barrel, and bored andrifled for the small cartridges, said bushing extending a short distancealong the barrel beyond the cartridge-chamber of said barrel, and havinga flange at the base corresponding to the flange of the large cartridge;also a spring or springs to secure it in the barrel, and also ashellextractor contrived to be worked by the rifle-shell extractor, allas hereinafter fully described.

Reference is to be had to the accompanying drawings, formingpart of thisspecification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is alongitudinal sectional elevation of a portion of a rifle,showing my improved cartridgerifle in side elevation and applied to therifle as in use. Fig. 2 is a longitudinal sectional elevation of myimproved cartridgerifle on an exaggerated scale, the section being online :20 a, Fig. 3. Fig. 3 is an end elevation of Fig. A. Fig. 4 is asection of Fig. 2 on line y y.

I make a steel bushing, a b, to fit in the breech of the rifle-barrel c,as shown, the part a fitting the cartridge-chamber of the barrel,

in side view atj, Fig. 2.

and the part 1) extending a short distance beyond said chamber along thebarrel, said bushing being bored and rifled suitably for the smallthirty-two-one-hundredths cartridges d, and also chambered in the breechforthe flange e of the said cartridge. It also has a flange, f,corresponding to the flange of the large cartridges to fit in thecounterbore of the rifle, and in the upper side is a slidingshell-extractor, q, which has a head, h, which occupies a slot of theflange f, so that the extractor i of the rifle will act on it the sameas it does on the flange of the large shell, and cause it to eject theshell of the small cartridges. The groove in which the extractor slidesis shown The cartridge-rifle is to fit snuglyin the barrel, but so thatit may be pushed out with the ramrod when not required for use, and oneor more springs, k, having ahead, 1, to drop into a nick or nicks madein the breech of the barrel 0, will be applied to it in a groove orgrooves in the exterior surface, as shown, for holding it more securely.

It will be seen that this simple device will enable the small andcheaper cartridges to be used instead of the larger ones, and will thussave much of the expense of gallery practice.

I am aware that it is not broadly new to use a rifle'bushing by which asmaller cartridge may be used than the one for which the rifle may havebeen intended originally; but

What I claim as new and of my invention lS- The combination, with thebushing a b, of one or more springs, in, each having a head, l, and aseat in the groove of the barrel, whereby the spring-head Z may beadapted to drop into a nick in the breech of the rifle, for the purposespecified.

HARRY T. MARTIN.

Witnesses:

MARTIN J. WEBER, JOHN DOYLE.

